SSM Health St Mary's Hospital - St Louis: charges and Medicare payments

SSM Health St Mary's Hospital - St Louis reported 1,065 Medicare inpatient stays across 42 DRGs in 2024. Across them it charged 2.48 times what it was paid — among the lower ratios in Missouri, number 52 of 59 hospitals with at least 100 stays (state median 3.85×, national 4.15×). Its most frequent stay was DRG 291, Heart Failure and Shock with MCC: 137 stays at an average charge of $35,110, 38% below the national average. It also billed 1,083 outpatient services, charging 6.1 times what Medicare paid.

1Medicare inpatient stays 1,065
2Charge ÷ paid, inpatient 2.48×
3Rank in MO (highest ratio = 1) 52 of 59
4CMS price-transparency actions 0

Average charge per stay at SSM Health St Mary's Hospital - St Louis, its 10 most frequent DRGs, bars to scale. Source: CMS DY2024.

Inpatient stays

For the 42 DRGs that can be compared with the national average, SSM Health St Mary's Hospital - St Louis charged more than the national average in 0 (0%). Payments follow Medicare's rates, so they usually vary far less than charges.

DRG	Stays	Avg charge	vs US	Avg paid
291 Heart Failure and Shock with MCC	137	$35,110	-38%	$13,746
871 Septicemia or Severe Sepsis without MV >96 Hours with MCC	136	$47,983	-47%	$18,985
392 Esophagitis, Gastroenteritis and Miscellaneous Digestive...	52	$22,290	-45%	$9,276
640 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and...	41	$32,485	-46%	$14,950
378 Gastrointestinal Hemorrhage with CC	34	$23,638	-51%	$11,006
683 Renal Failure with CC	33	$21,775	-47%	$10,136
682 Renal Failure with MCC	31	$31,591	-52%	$15,056
853 Infectious and Parasitic Diseases with O.R. Procedures with...	31	$143,530	-37%	$49,385
189 Pulmonary Edema and Respiratory Failure	29	$35,019	-39%	$13,184
689 Kidney and Urinary Tract Infections with MCC	29	$26,262	-49%	$12,870
177 Respiratory Infections and Inflammations with MCC	27	$37,695	-47%	$16,585
193 Simple Pneumonia and Pleurisy with MCC	27	$30,375	-49%	$13,440
698 Other Kidney and Urinary Tract Diagnoses with MCC	27	$35,265	-52%	$17,150
377 Gastrointestinal Hemorrhage with MCC	25	$41,111	-52%	$18,403
690 Kidney and Urinary Tract Infections without MCC	24	$21,184	-44%	$9,267
699 Other Kidney and Urinary Tract Diagnoses with CC	20	$32,636	-31%	$10,652
391 Esophagitis, Gastroenteritis and Miscellaneous Digestive...	19	$29,460	-52%	$13,117
552 Medical Back Problems without MCC	18	$20,500	-58%	$10,040
637 Diabetes with MCC	18	$24,540	-63%	$14,316
641 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and...	18	$23,339	-37%	$8,696
872 Septicemia or Severe Sepsis without MV >96 Hours without MCC	18	$27,615	-44%	$11,485
309 Cardiac Arrhythmia and Conduction Disorders with CC	17	$23,857	-34%	$8,752
603 Cellulitis without MCC	17	$17,522	-53%	$9,989
312 Syncope and Collapse	16	$27,490	-40%	$9,844
638 Diabetes with CC	16	$29,155	-30%	$10,433
330 Major Small and Large Bowel Procedures with CC	15	$75,873	-36%	$20,972
481 Hip and Femur Procedures except Major Joint with CC	15	$53,279	-47%	$17,941
280 Acute Myocardial Infarction, Discharged Alive with MCC	13	$42,788	-44%	$16,432
314 Other Circulatory System Diagnoses with MCC	13	$54,005	-43%	$19,923
057 Degenerative Nervous System Disorders without MCC	12	$23,039	-59%	$13,494
175 Pulmonary Embolism with MCC or Acute Cor Pulmonale	12	$37,660	-42%	$13,310
305 Hypertension without MCC	12	$21,183	-47%	$8,950
322 Percutaneous Cardiovascular Procedures with Intraluminal...	12	$60,437	-47%	$19,156
884 Organic Disturbances and Intellectual Disability	12	$32,745	-48%	$16,891
885 Psychoses	12	$21,142	-52%	$13,094
069 Transient Ischemia without Thrombolytic	11	$22,979	-54%	$8,894
100 Seizures with MCC	11	$77,045	-18%	$23,145
308 Cardiac Arrhythmia and Conduction Disorders with MCC	11	$28,100	-50%	$12,749
389 Gastrointestinal Obstruction with CC	11	$18,137	-53%	$9,177
393 Other Digestive System Diagnoses with MCC	11	$25,525	-67%	$16,645
470 Major Hip and Knee Joint Replacement or Reattachment of...	11	$52,750	-43%	$18,589
660 Kidney and Ureter Procedures for Non-Neoplasm with CC	11	$34,577	-49%	$12,647

Outpatient services

Service (APC)	Services	Avg charge	Medicare allowed
Comprehensive Observation Services	166	$13,503	$2,367
Level 2 Urology and Related Services	100	$1,442	$593
Level 1 Nerve Procedures	80	$10,344	$1,650
Level 3 Urology and Related Services	79	$7,082	$1,780
Level 2 Upper GI Procedures	71	$4,876	$1,644
Level 2 Excision/ Biopsy/ Incision and Drainage	70	$9,710	$1,401
Level 4 Urology and Related Services	51	$14,113	$2,956
Level 4 Gynecologic Procedures	50	$13,739	$2,689
Level 5 Musculoskeletal Procedures	48	$45,483	$11,490
Level 3 Vascular Procedures	48	$13,597	$2,786
Level 1 Laparoscopy and Related Services	31	$23,813	$4,525
Level 5 Gynecologic Procedures	31	$25,680	$4,348
Level 1 Endovascular Procedures	30	$19,247	$2,853
Level 3 Excision/ Biopsy/ Incision and Drainage	29	$12,573	$2,416
Level 3 Musculoskeletal Procedures	26	$19,192	$2,656
Level 5 Urology and Related Services	24	$21,148	$4,523
Level 1 Abdominal/Peritoneal/Biliary and Related Procedures	22	$11,733	$2,915
Level 6 Gynecologic Procedures	21	$38,206	$6,605
Level 1 Breast/Lymphatic Surgery and Related Procedures	19	$17,117	$3,332
Level 4 Musculoskeletal Procedures	19	$31,302	$6,001
Level 2 Laparoscopy and Related Services	19	$42,018	$8,994
Level 2 Neurostimulator and Related Procedures	14	$19,385	$5,551
Level 2 Vascular Procedures	13	$7,602	$1,400
Level 2 Breast/Lymphatic Surgery and Related Procedures	11	$33,912	$5,700
Level 4 Endovascular Procedures	11	$62,478	$15,298

Against the Missouri average

For Heart Failure and Shock with MCC (DRG 291), SSM Health St Mary's Hospital - St Louis charged $35,110 on average, 24% less than the Missouri average of $46,468, and was paid $13,746 against a state average of $10,539. For Septicemia or Severe Sepsis without MV >96 Hours with MCC (DRG 871), SSM Health St Mary's Hospital - St Louis charged $47,983 on average, 34% less than the Missouri average of $72,886, and was paid $18,985 against a state average of $15,808. For Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC (DRG 392), SSM Health St Mary's Hospital - St Louis charged $22,290 on average, 31% less than the Missouri average of $32,372, and was paid $9,276 against a state average of $6,937. For Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC (DRG 640), SSM Health St Mary's Hospital - St Louis charged $32,485 on average, 33% less than the Missouri average of $48,331, and was paid $14,950 against a state average of $11,217. For Comprehensive Observation Services (outpatient APC 8011), its average charge of $13,503 was 34% below the state average of $20,571. For Level 2 Urology and Related Services (outpatient APC 5372), its average charge of $1,442 was 51% below the state average of $2,933. For Level 1 Nerve Procedures (outpatient APC 5431), its average charge of $10,344 was 2% below the state average of $10,541. For Level 3 Urology and Related Services (outpatient APC 5373), its average charge of $7,082 was 41% below the state average of $11,923.

Price-transparency record

No action in CMS's price-transparency enforcement list (July 2026) matches this hospital's exact name, city and state. That can mean CMS has not reviewed it, or that it is listed under a different name.

Charges are the hospital's list prices averaged over its 2024 Medicare cases; payments are what those cases actually brought in. Neither is what you will pay. For a planned procedure, ask the hospital for its price estimate or, if you are uninsured or self-paying, a good-faith estimate.

Sources: CMS Medicare Inpatient Hospitals — by Provider and Service / by Geography and Service, data year 2024; CMS Medicare Outpatient Hospitals — by Provider and Service / by Geography and Service, data year 2024; CMS Hospital Price Transparency Enforcement Activities and Outcomes, July 2026. Checked 2026-10-24. Methodology.